Fix FastAPI path parameters to handle file paths with forward slashes (#848)

Co-authored-by: Tim O'Farrell <[email protected]>

Author: amanape

openhands-agent-server/openhands/agent_server/file_router.py

@@ -21,7 +21,7 @@
 config = get_default_config()
 
 
-@file_router.post("/upload/{path}")
+@file_router.post("/upload/{path:path}")
 async def upload_file(
     path: Annotated[str, FastApiPath(alias="path", description="Absolute file path.")],
     file: UploadFile = File(...),
@@ -54,7 +54,7 @@ async def upload_file(
         )
 
 
-@file_router.get("/download/{path}")
+@file_router.get("/download/{path:path}")
 async def download_file(
     path: Annotated[str, FastApiPath(description="Absolute file path.")],
 ) -> FileResponse: